2027 Social Security wage base is $192,300 (official)

The short answer. The official 2027 Social Security wage base — the annual ceiling on earnings subject to the 6.2% Social Security tax — is $192,300, announced by the Social Security Administration on October 14, 2026 and set out in Federal Register document 2026-21796. That is $7,800 above the 2026 base of $184,500. The maximum Social Security tax an employee can owe for 2027 is 6.2% of $192,300, or $11,922.60, up $483.60 from $11,439.00 in 2026. A self-employed person pays both halves at 12.4%, a maximum of $23,845.20. Before the announcement, the Social Security Trustees’ 2026 report had projected $190,200; the official figure came in $2,100 higher.

What the wage base actually is

The Social Security wage base, formally called the contribution and benefit base, is the annual ceiling on earnings subject to the Old-Age, Survivors, and Disability Insurance (OASDI) portion of Social Security payroll tax. Below the cap, every dollar of wages is taxed at the 6.2% Social Security rate on the employee side. Above it, those earnings escape the tax entirely. So the most an employee can pay in Social Security tax in a year is 6.2% of the base, and once your year-to-date earnings cross that line, the 6.2% stops coming out of your paycheck for the rest of the year. That 6.2% is only the employee’s half; your employer pays a matching 6.2% on the same capped wages, for a combined 12.4%. If you are self-employed, you pay both halves yourself — the full 12.4% Social Security portion of self-employment tax — again only on earnings up to the wage base.

That ceiling is exactly what our wage base definition tracks year over year, because it moves on a schedule of its own. For 2026 it sits at $184,500, a meaningful step up from the $176,100 base that applied in 2025, and for 2027 it moves to $192,300.

How the cap gets set each year

Here is the detail that trips up most people: the wage base is not indexed to consumer prices the way tax brackets or income-related Medicare premium adjustments are. Instead, it climbs in step with growth in the national average wage index (AWI). When the typical American wage rises, the ceiling rises with it, roughly preserving the share of total earnings that the tax reaches.

That distinction matters for forecasting. Price inflation and wage growth do not move in lockstep, and the Trustees’ assumptions are deliberately cautious. This year that caution showed: the SSA’s average wage index for 2025 came in at $72,800.33, up 4.23 percent from $69,846.57 in 2024, and the unrounded 2027 base worked out to $192,353.14, which the SSA publishes as $192,300.

What we projected versus what happened

The Social Security Trustees’ 2026 report, under its intermediate (best-estimate) assumptions, projected a 2027 wage base of $190,200. We framed that as the Trustees’ projection rather than the official base, and said the official figure could land a little higher because wage indexing had been running ahead of the Trustees’ cautious assumptions. That is what happened. The official base is $192,300, which is $2,100 above the projection, and the maximum tax is $11,922.60 rather than the $11,792.40 the projection implied (6.2% of $190,200).

The verdict is that the direction was right and the size of the miss was modest: about 1.1 percent. The figure that governs payroll withholding for 2027 is now the SSA’s, and employers’ payroll systems will stop withholding the 6.2% once an employee’s 2027 wages pass $192,300.

What the cap does not cap

The wage base limits the 6.2% OASDI tax and nothing else on the Social Security side. It does not touch Medicare. The 1.45% Medicare Hospital Insurance tax applies to every dollar of earnings with no ceiling at all, and on top of that an Additional Medicare Tax of 0.9% kicks in on wages above filing-status thresholds. So crossing the wage base partway through the year stops your Social Security tax for the rest of that year — but your Medicare tax keeps right on going, and for high earners it actually steps up rather than stops.

This is the cleanest way to think about a December paycheck for someone well over the cap: the 6.2% line has gone quiet, while the Medicare line is still there, possibly carrying the extra 0.9% surtax.

Why it is the contribution and benefit base

The same ceiling that limits the tax also limits the benefit. The cap is the maximum amount of earnings counted toward your future Social Security benefit, which is precisely why it carries the longer name, the contribution and benefit base. Earnings above the line are a true dead zone on both sides: they are not taxed for OASDI, and they do not raise the benefit you will eventually collect. You neither pay in nor build up entitlement on the slice of income above the cap.

That symmetry is the program’s logic in miniature. The system caps what it taxes because it also caps what it promises to pay back.

What high earners should watch

If you earn more than the base, you will reach the Social Security tax ceiling partway through the year and watch that 6.2% vanish from your paycheck for the rest of it — a small, predictable raise in take-home pay late in the year. The wrinkle shows up when you have two employers. Each one withholds Social Security tax independently, capping only against the wages it pays you, so together they can withhold more than the single annual maximum. The fix is straightforward: you reclaim the excess Social Security tax as a credit on your federal tax return, so you are not out the over-withheld amount for good — just until you file.

For 2026, run your planning against $184,500. For 2027, use $192,300: it is now official, so there is no placeholder to recheck. A ceiling that moves every year is easiest to plan around when you keep the two bases side by side.

The wage base is not the only figure from the October 14 announcement. The cost-of-living adjustment, 3.6 percent, was published the same day, and we show how the number was built from the CPI-W in the 2027 COLA tracker.

Sources

• Federal Register document 2026-21796 — Social Security Administration, “Cost-of-Living Increase and Other Determinations for 2027”: 2027 contribution and benefit base of $192,300.
• Social Security Administration press release, October 14, 2026 — “Social Security Announces 3.6 Percent Benefit Increase for 2027.”
• Social Security Administration — 2026 OASDI Trustees Report — intermediate-assumption projection of the 2027 contribution and benefit base ($190,200), now superseded.
• IRS — Form 1040-ES (2026) — 2026 Social Security wage base of $184,500 in the self-employment tax worksheet.
• Social Security Administration — 2026 COLA fact sheet — 2026 maximum taxable earnings ($184,500, up from $176,100).
• 26 U.S.C. §3101 and §3111 — the 6.2% and 1.45% employee and employer rates and the 0.9% Additional Medicare Tax.